Cannot use Model Parameters as denominator

[radiophysique]

Very strange behavior, when I create an User Parameter, it is not possible to use a Model Parameter as denominator. Using the Model Parameters as nominator works fine. I tried different ways (in examples d2=1250mm):

• Unit: mm, Expression: 20/d2, not accepted (strange)
• Unit: mm, Expression: d2/20, Value: 62.5 (correct)
• Unit: No units, Expression: 20mm/d2, Value: 20 (it accepts the expression but the value is wrong, resets after save)
• Unit: No units, Expression: d2/20mm, Value: 62.5 (correct)

Am I doing something wrong? Could anyone check this please?

[jeff_strater · Accepted solution]

it's all about the units.  Your expression 20/d2, is interpreted as "20 mm / d2", and d2 is in mm units.  So, you need to remove the units from the denominator, something like this:

[radiophysique]

Thank you Jeff again 🙂